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FM reception - aftermarket HU - 5th gen

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Old 08-10-2005, 09:28 AM
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FM reception - aftermarket HU - 5th gen

yo homies

got my aftermarket stereo stuff installed (replaced bose) and now it seems like i get mostly bad reception, i have a 2002 and for some reason there is no antenna on these things, maybe its hidden in the back window or somthing i dunno

did they do somthing wrong or do other people have this problem

also when they integrated my steering wheel controls when i hit the track up button it always skips 2 ahead, but the down button works fine, so thats why im thinking maybe its the installers but i wanted to make sure it wasnt a known maxima issue
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Old 08-10-2005, 10:00 AM
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I dont get good FM reception - aftermarket HU either
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Old 08-10-2005, 07:47 PM
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what kind do you have, i have a kenwood with the flipdown thingy

anyone else have this problem, i think im going to call and complain
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Old 08-11-2005, 06:42 AM
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kenwood ktv911
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Old 08-11-2005, 04:02 PM
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On the antenna adapter....with 2 pins....install it opposite the way it is supposed to go in. In other wods the locks on the plugs wont latch.....worked for me......

-Jason
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Old 08-11-2005, 08:55 PM
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Supposedly this is a problem with all aftermarket HUs. Our cars have the antenna in the rear window. The 2-pin system is apparently designed to work with the stock HU because it has special tuning built-in that properly combines the two signals to produce "good" reception. Aftermarket HUs are designed for regular antennas and do not have the special tuning required to decode the signals or whatever from the stock antenna in these cars.

I believe the only thing you can do is install a separate aftermarket antenna.
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Old 08-11-2005, 11:40 PM
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According to an installer i met, he explains that the reason is a difference in impedence between a regular antenna and a dual diversity antenna in the maxima.

Nothing can be done.
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Old 08-12-2005, 12:05 AM
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i had the same exact problem... i went with satelite radio... Solved my probelm...
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Old 08-12-2005, 12:45 AM
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yeah i have that problem too
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Old 08-12-2005, 05:59 AM
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Originally Posted by shoman94
On the antenna adapter....with 2 pins....install it opposite the way it is supposed to go in. In other wods the locks on the plugs wont latch.....worked for me......

-Jason

did anyone try this guy's workaround?

the antenna adapter is behind the HU right in the dash?

ill have to tell the installers to give it a wing
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Old 08-12-2005, 07:08 AM
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Originally Posted by 3DazeGrace
did anyone try this guy's workaround?

the antenna adapter is behind the HU right in the dash?

ill have to tell the installers to give it a wing
I tried this, and I don't remember it solving anything, but to be fair, I didn't give it much time. I really don't see how this would work anyway.
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Old 08-12-2005, 07:16 AM
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i had the exact same problem, and i saw a thread on here and i fixed it. im not sure if i am describing it right, if you have the bosch wiring unit and you connect all the wires together i think there is a subwoofer wire that is not connected to anything, and it tells you not to connect it. well if you connect it to the ground wires then the radio works fine.
again im not sure if it is a subwoofer wire or what it is, but that was the problem for me and a handful of other guys on here.
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Old 08-12-2005, 07:22 AM
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Originally Posted by Ephraim
i had the exact same problem, and i saw a thread on here and i fixed it. im not sure if i am describing it right, if you have the bosch wiring unit and you connect all the wires together i think there is a subwoofer wire that is not connected to anything, and it tells you not to connect it. well if you connect it to the ground wires then the radio works fine.
again im not sure if it is a subwoofer wire or what it is, but that was the problem for me and a handful of other guys on here.
Since when does Bosch make wiring harnesses for aftermarket HUs?
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Old 08-12-2005, 08:41 AM
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i guess ill try more google searches against the maxima org for the fix

it should be a sticky
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Old 08-12-2005, 12:19 PM
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i had a scosche harness
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Old 12-07-2005, 08:41 AM
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it works to certain extent

Originally Posted by TheBigDu
I tried this, and I don't remember it solving anything, but to be fair, I didn't give it much time. I really don't see how this would work anyway.
it worked by doubling my signal strength(more volume) however, the static noice is still audible. After reading this I confirmed my diversity pins are fine since no problem with factory. And finally the reason it make the difference by reversing which I did also was apparantly only one of the recepticle holes has a connection leading to the single plug(look inside you'll see the metal). and apparantly by switching, the louder signal from the opposite diversity lead was able to go through . . ..
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Old 12-07-2005, 08:44 AM
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could it be the dimmer negative wire?

Originally Posted by Ephraim
i had the exact same problem, and i saw a thread on here and i fixed it. im not sure if i am describing it right, if you have the bosch wiring unit and you connect all the wires together i think there is a subwoofer wire that is not connected to anything, and it tells you not to connect it. well if you connect it to the ground wires then the radio works fine.
again im not sure if it is a subwoofer wire or what it is, but that was the problem for me and a handful of other guys on here.
the only wire i have unconnected is the dimmer negative wire but it is shielded .. . let me groud this baby out to see. . .
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Old 12-15-2005, 07:05 AM
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no more noise

after market antenna didn't solve the problem. Make sure to ground the HU to itself, providing same ground as power antenna since there's no ground in factory wiring and grounding to the back chassis didn't provide common ground with the antenna. it's not a diversity antenna issue since it has the window antenna in addition to the regular antenna and if you use the after market antenna adaptor, you are effectively using the regular antenna unless you reverse the adaptor as one OP suggested.
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Old 12-15-2005, 09:24 AM
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i have a 3rd gen. maxima and an eclipse head unit. I was thinking about listening to just FM radio. So you guys think that I'm gonna get crappy reception with the Eclipse head unit? If so, what should I do? Should I try to buy a 3rd gen. stock radio receiver? Or should I try to change my stock antenna and keep the Eclipse?
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Old 12-16-2005, 04:55 PM
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did you guys remember to hook up the power antenna wire? without it i get like 2 stations. After i hooked it up my reception is phenomenal
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Old 12-17-2005, 08:28 AM
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i get all the stations the factory HU used to get, it's just some distant ones sound staticky, which is quite normal
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Old 12-17-2005, 11:31 AM
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On your metra/scosche wiring harness, make sure the solid blue wire is hooked up to the blue/white wire coming out of the aftermarket head unit. Thats the power antenna wire, and by connecting it to remote turn on you are essentially "amplifying" the signal, in not so many words.
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Old 12-24-2005, 08:48 AM
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Originally Posted by djfrestyl
On your metra/scosche wiring harness, make sure the solid blue wire is hooked up to the blue/white wire coming out of the aftermarket head unit. Thats the power antenna wire, and by connecting it to remote turn on you are essentially "amplifying" the signal, in not so many words.
just to clarify: On the 03, My antenna 12V power lead coming out of the SONY HU is solid blue which gets connected to metra's blue which is connected to the factory green/white. My SONY's blue/white wire is the AMP remote turn on, not to be confused with the power antenna.
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Old 12-24-2005, 11:53 AM
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That is correct, but throw out the Sony HU
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Old 12-25-2005, 07:02 AM
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i like the 120dB S/N for cds, crisp sound. Ya think it's the cause of my FM problem? I've heard of bad receptions with other HUs though . . .
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Old 12-25-2005, 12:44 PM
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I've never had any problems with fm reception.

Here is how my setup is like, maybe that will help some of you:
-Eclipse cd8454 / 8455 - both get good reception
-Grounded to chasis - there are two nuts at the bottom of the dash when you pull the radio/climate assy out, I unbolted one nut and grounded my hu over there along with my pac swi-x Picture of my grounding point
-I'm using some antenna adapter which converts the nissan 2 pin plug into a single plug for my hu to accept. I dont know what brand it is. There were two of them there because the dealer installed a pos fm modulated 12 disc cd changer instead of the bose 6disc when the car was purchased new. I only ended up using one of them. Picture of my antenna adapter
-Power antenna wire from hu is connected to power antenna wire from metra harness.
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Old 12-25-2005, 07:24 PM
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Originally Posted by ypl102
i like the 120dB S/N for cds, crisp sound. Ya think it's the cause of my FM problem? I've heard of bad receptions with other HUs though . . .

yeah, but the highest Eclipse HU has a S/N ratio of 100 db, so even if CDs are 120 db, unless the decoder has a S/N ratio of 120 db, you won't be enjoying the CDs to the fullest.
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Old 12-25-2005, 08:43 PM
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I bought my 2000 Max back in March and it had an aftermarket HU with very bad reception on all stations. I took it to the stereo store to get it fixed. They said that the diversity antenna in the back glass had a antenna amplifier or booster that did not have the turn on lead connected to the aftermarket HU. They connected it and now I have great reception.
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